It's called professionalism, and the wide-spread lack of it in local bands (mostly week-enders) is why I keep a full calendar.
I played with some top-notch bands years ago. There were ALWAYS probems. The drummer was drunk, the guitar player was fooling with the bass man's wife. The singer got pregnant. Somebody got drafted (remember the draft?)
One guy wanted more money because more of the gear was his. Another guy didn't want to help set up. Etc. etc. etc. (The King and I).
DonM